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PDF Annotator

PDF Tools

Add comments, highlights, and annotations to PDF files. Free and browser-based.

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PDF limits: 25 MB per file, 100 pages, 2000 points per page side.

PDF File
PDFClick or drag a PDF hereReview markup is added locally with the original PDF underneath

Leaving feedback on a shared draft and actually changing the document's content are two different operations that shouldn't be confused, a reviewer highlighting a paragraph and adding a comment needs the original text to stay visible underneath the markup. This tool draws text comments, highlights, and rectangles over a PDF page without replacing its underlying content.

See more about the PDF Annotator

Useful for leaving feedback on a shared draft, highlighting a specific clause in a contract for discussion before anyone edits it, or marking up a document for review while keeping the actual text intact. Input PDFs are limited to 25 MiB, 100 pages and 2,000 points per page side.

Examples

Leave feedback without editing the original

Input: draft.pdf, comment: "Clarify this paragraph" on page 3
Output: draft-annotated.pdf (original text unchanged)

Keeps the original wording visible beneath the review markup.

Highlight a clause for discussion

Input: contract.pdf, highlight: paragraph 4.2
Output: contract-annotated.pdf

Marks a specific section without altering the underlying text.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

Quick answers for PDF Annotator

What PDF limits apply?
Up to 25 MiB per input PDF, 100 pages and 2,000 points per page side.